add v6.4 release notes (#11245) (#11346)

* Create release-6.4.0.md

* Update release-6.4.0.md

* Apply suggestions from code review

* Apply suggestions from code review

* add translations

* Apply suggestions from code review

* add translation

* update improvements, bug fixes, contributors using the latest Chinese version

* translate dm, ticdc, and br new features

* add translation for compatibility changes

* Apply suggestions from code review

* Apply suggestions from code review

Co-authored-by: xixirangrang <hfxsd@hotmail.com>

* update tikv and pd sections

* Update releases/release-6.4.0.md

* Update releases/release-6.4.0.md

* Update releases/release-6.4.0.md

* Apply suggestions from code review

Co-authored-by: shichun-0415 <89768198+shichun-0415@users.noreply.github.com>

* Apply suggestions from code review

* add translation of improvements and bug fixes (TiFlash, TiDB Lightning, and TiDB Dashboard)

* Update releases/release-6.4.0.md

* apply suggestions from code review

* Apply suggestions from code review

Co-authored-by: Grace Cai <qqzczy@126.com>

* Apply suggestions from code review

Co-authored-by: xixirangrang <hfxsd@hotmail.com>

* add translation for key features

Co-authored-by: Ran <huangran.alex@gmail.com>

* Update releases/release-6.4.0.md

* Apply suggestions from code review

* Update releases/release-6.4.0.md

Co-authored-by: shichun-0415 <89768198+shichun-0415@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Aolin <aolinz@outlook.com>
Co-authored-by: shichun-0415 <89768198+shichun-0415@users.noreply.github.com>
Co-authored-by: xixirangrang <hfxsd@hotmail.com>

* remove duplicate white spaces

* Apply suggestions from code review

Co-authored-by: Daniël van Eeden <github@myname.nl>
Co-authored-by: Aolin <aolinz@outlook.com>
Co-authored-by: xixirangrang <hfxsd@hotmail.com>

* add new updates

* remove the writer information

* Update release-6.4.0.md

* Apply suggestions from code review

Co-authored-by: Ping Yu <shui.yu@126.com>

* fix typo

* Apply suggestions from code review

Co-authored-by: Aolin <aolinz@outlook.com>

* unify the format of user document reference

* Update releases/release-6.4.0.md

* fix broken links

* fix some errors

* Update release-6.4.0.md

* Apply suggestions from code review

* Update releases/release-6.4.0.md

Co-authored-by: qiancai <qqzczy@126.com>
Co-authored-by: TomShawn <41534398+TomShawn@users.noreply.github.com>
Co-authored-by: Ran <huangran.alex@gmail.com>
Co-authored-by: Aolin <aolin.zhang@pingcap.com>
Co-authored-by: shichun-0415 <lishichun@pingcap.com>
Co-authored-by: xixirangrang <hfxsd@hotmail.com>
Co-authored-by: Aolin <aolinz@outlook.com>
Co-authored-by: shichun-0415 <89768198+shichun-0415@users.noreply.github.com>
Co-authored-by: Daniël van Eeden <github@myname.nl>
Co-authored-by: Ping Yu <shui.yu@126.com>

TOC.md

@@ -4,7 +4,7 @@
 - [Docs Home](https://docs.pingcap.com/)
 - About TiDB
   - [TiDB Introduction](/overview.md)
-  - [TiDB 6.3 Release Notes](/releases/release-6.3.0.md)
+  - [TiDB 6.4 Release Notes](/releases/release-6.4.0.md)
   - [Basic Features](/basic-features.md)
   - [Experimental Features](/experimental-features.md)
   - [MySQL Compatibility](/mysql-compatibility.md)
@@ -900,6 +900,8 @@
   - [Release Timeline](/releases/release-timeline.md)
   - [TiDB Versioning](/releases/versioning.md)
   - [TiDB Installation Packages](/binary-package.md)
+  - v6.4
+    - [6.4.0-DMR](/releases/release-6.4.0.md)
   - v6.3
     - [6.3.0-DMR](/releases/release-6.3.0.md)
   - v6.2